55222154400 has 144 divisors (see below), whose sum is σ = 205426476864. Its totient is φ = 12622202880.

The previous prime is 55222154399. The next prime is 55222154413. The reversal of 55222154400 is 445122255.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1626717 + ... + 1660316.

It is an arithmetic number, because the mean of its divisors is an integer number (1426572756).

Almost surely, 2^55222154400 is an apocalyptic number.

55222154400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55222154400 is an abundant number, since it is smaller than the sum of its proper divisors (150204322464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55222154400 is a wasteful number, since it uses less digits than its factorization.

55222154400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287063 (or 3287050 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

Adding to 55222154400 its reverse (445122255), we get a palindrome (55667276655).

The spelling of 55222154400 in words is "fifty-five billion, two hundred twenty-two million, one hundred fifty-four thousand, four hundred".